root/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c

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DEFINITIONS

This source file includes following definitions.
  1. amdgpu_sdma_get_instance_from_ring
  2. amdgpu_sdma_get_index_from_ring
  3. amdgpu_sdma_get_csa_mc_addr

   1 /*
   2  * Copyright 2018 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  */
  23 
  24 #include "amdgpu.h"
  25 #include "amdgpu_sdma.h"
  26 
  27 #define AMDGPU_CSA_SDMA_SIZE 64
  28 /* SDMA CSA reside in the 3rd page of CSA */
  29 #define AMDGPU_CSA_SDMA_OFFSET (4096 * 2)
  30 
  31 /*
  32  * GPU SDMA IP block helpers function.
  33  */
  34 
  35 struct amdgpu_sdma_instance *amdgpu_sdma_get_instance_from_ring(struct amdgpu_ring *ring)
  36 {
  37         struct amdgpu_device *adev = ring->adev;
  38         int i;
  39 
  40         for (i = 0; i < adev->sdma.num_instances; i++)
  41                 if (ring == &adev->sdma.instance[i].ring ||
  42                     ring == &adev->sdma.instance[i].page)
  43                         return &adev->sdma.instance[i];
  44 
  45         return NULL;
  46 }
  47 
  48 int amdgpu_sdma_get_index_from_ring(struct amdgpu_ring *ring, uint32_t *index)
  49 {
  50         struct amdgpu_device *adev = ring->adev;
  51         int i;
  52 
  53         for (i = 0; i < adev->sdma.num_instances; i++) {
  54                 if (ring == &adev->sdma.instance[i].ring ||
  55                         ring == &adev->sdma.instance[i].page) {
  56                         *index = i;
  57                         return 0;
  58                 }
  59         }
  60 
  61         return -EINVAL;
  62 }
  63 
  64 uint64_t amdgpu_sdma_get_csa_mc_addr(struct amdgpu_ring *ring,
  65                                      unsigned vmid)
  66 {
  67         struct amdgpu_device *adev = ring->adev;
  68         uint64_t csa_mc_addr;
  69         uint32_t index = 0;
  70         int r;
  71 
  72         if (vmid == 0 || !amdgpu_mcbp)
  73                 return 0;
  74 
  75         r = amdgpu_sdma_get_index_from_ring(ring, &index);
  76 
  77         if (r || index > 31)
  78                 csa_mc_addr = 0;
  79         else
  80                 csa_mc_addr = amdgpu_csa_vaddr(adev) +
  81                         AMDGPU_CSA_SDMA_OFFSET +
  82                         index * AMDGPU_CSA_SDMA_SIZE;
  83 
  84         return csa_mc_addr;
  85 }

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